Otherwise, well, you play the game, which is a mix of storytelling, chitchat, and combat missions.
The human characters, at least, are confident, consenting adults, described as 'perpetually horny,' which of course enables the fantasy of grazing among a crew of women who are always eager to put on sexual performances, even for a self-described 'loser' like the Captain.
Fortune, an elite hacker also introduced at the start of Subverse, does have a personality distinct from a sexual fetish, though as one of Subverse's advertised 'waifus,' she must join the crew eventually (I don't know what her deal ends up being, so I'll leave a question mark there).
On Steam, Studio FOW describes Subverse's adult content as being fetish-oriented and 'hand-crafted by a team of degenerate neckbeards,' and that seems like an honest self-assessment, given that the first two sexual partners are a robot augmented for sex and a woman who mind controls pseudo-animals to fulfill her desires.
There's a bit where out-of-control 'fuccbotts' with 'laser cockswords' attack a space station that looks like a giant ass, for example.